refine syntax pattern for uniqueness

backend/Builtin/Syntax.icl

@@ -496,11 +496,11 @@ bs_synonym_abstract =
 
 bs_unique =
 	{ syntax_title         = "uniqueness annotation"
-	, syntax_patterns      = ["\\*", "[", "]", "."]
+	, syntax_patterns      = ["\\*", "[", "]", ".", ":"]
 	, syntax_code          =
 		["*..."
 		,". ..." 
-		,"v ... | [v ..]" 
+		,"v:.. | [v ..]" 
 	, syntax_description   = "Annotates a type with its uniqueness. A type can either be unique (`*`), not unique (not annotated), possibly unique (`.`) or relatively unique (identifier and `| [..]`). Note that when using unique types in a function or an ADT the container must also be unique. e.g. `T = T (Int, *File)` has to be `T = T *(Int, *File)`. Functions have to be split up into arity 1 and the sub functions need to be annotated as well. e.g. `T = T (Int *Int -> *Int)` has to be `T = T (Int -> *(*Int -> *Int))`."
 	, syntax_doc_locations = [CLR 11 "9.1" "_Toc311798093"]
 	, syntax_examples      = map EX